Ucas
(uca 的复数) abbr. upper control area 上部控制区
🗣️ 情景例句
I need to post a letter.
我得去寄封信。
Would you be so kind as to open this window for me? It's stuck.
你能为我打开这扇窗户吗？ 它粘住了。
he had great difficulty in controlling the car because a tyre burst during the first run.
但他很难把汽车控制住，因为在开始的行程中爆了一只轮胎。